Sample Mg-5
NavDat sample number 18433 · RHYOLITE
Sample
| Sample ID | Mg-5 |
|---|---|
| Rock name | RHYOLITE |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
| Comment | phenos of sanidine and quartz; lightly oxidized groundmass of graphic quartzo-feldspathic patches and cryptofelsite with incipient spheralitic recrystallization |
Location
| Latitude | 44.3402 |
|---|---|
| Longitude | -114.843 |
| Location | around Mt. Mcgowan |
| State / province | Idaho |
| Volcanic field | Challis Volcanics |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 46 | 43 | 49 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 77.26 | WT% | AAS | |
| TIO2 | 0 | WT% | AAS | |
| AL2O3 | 10.14 | WT% | AAS | |
| FE2O3 | 1.19 | WT% | AAS | |
| FEO | 0.25 | WT% | TIT | |
| MNO | 0.03 | WT% | AAS | |
| MGO | 0.01 | WT% | AAS | |
| CAO | 0.55 | WT% | AAS | |
| NA2O | 3.34 | WT% | AAS | |
| K2O | 5.98 | WT% | AAS | |
| P2O5 | 0 | WT% | AAS | |
| H2O_PLUS | 1.04 | WT% | UNKNOWN | |
| H2O_MINUS | 0.4 | WT% | UNKNOWN | |
| TOTAL | 100.18 | WT% | AAS | |
| RB | 211 | PPM | XRF | |
| SR | 26 | PPM | XRF | |
| BA | 204 | PPM | AAS | |
| CR | 13 | PPM | AAS | |
| ZR | 175 | PPM | XRF | |
| ZN | 57 | PPM | AAS | |
| CU | 5 | PPM | AAS |